Rod-packing.



E. J. ARM$TRONG.

ROD PACKING.

APPLICATION FILED MAY 20, 1909.

946,001 Patented Jan. 11,1910.

I To all QU NN nit may a'citizen of the United States, residing at osrnfijasrnrnnr anion.

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non-PAomma specification of Letters Patent. 4- I Patented J an. 11, 1910.

Application filed ma 20, 1909. Serial n. 497,188.

.The invention relates to rod packing and consists in certain improvementsin the construction thereof as will be hereinafter fully described and pointed out in the claims.

- In carryingout my invention I form the packing of alternate rings of metal and ,elastic material. The metal rings relieve the rod of the friction usuallypresent where elastic packing is used and -,also reduces. the wearon the rod. The elastic packing, on the other hand, assures a tight joint and the taking up of any or on the rod. I preferably form the metal rings of two halves, each'forming practically a complete ring in itself. Ordinarily I propose to form soft malleable bars of metal of triangular shape in the cxggss'lsection and of indefinite length. .This bar is cut as needed so as to form the packing rings, each half of the ring bein formed by a portion of the bar, and these ha ves being arranged side byside, form a completed rin of trian ular-shape in cross section and with the joints broken. I prefer also to add to these portions of the completed ring an interlocking feature so that two halves cannot rotate relatively to each other so as to bring the joints into register.-

The invention is illustrated in accompanying drawings as follows: Figure 1 shows a central section through thestufling box with the packing in place. Fig. 2 shows a fragment of a bar from which the packing rings arefo'rmed. Fig. 3 shows one of the metallic packing rings complete and bent to shape.

l marks the rod, 2 the stufling box, and 3 the gland. Thebars 4 have the ll 5 5 which are adapted to overlap the edge o an opposing bar. Spaces 6 are arranged between the overlapping lips, the spaces being at least equal in length to the lips so that when two lips of one will enter the other, thus locking the two portions of the bar 4 are arranged side by side and opposingly spaces 6 o the parts of the completering against rotationmelatively to each other so that the joints such as 7 and 8 cannot be brought into register.

The complete r ng formed by bending the inequalities either in the stu-fiing boxfaced the overlap ing bars 4 and placing the twofopposing portions side'by side in the position shown in Fig. 3, is of triangular shape, in cross section, the outer surfaces 9 beingpreferably' somewhat concave so as to better receive a round elastic packing 10.

Itwill be observed thatsingle bars with the lips removed can be used atthe end of the stuffing box, thus completing the .me-

tallic wearing surface throughout the length of the stufling box. With packing formed as shown, the bars 4 may be marketed in indefinite lengths so that it can be cut off-to form rings of'any diameter, and the halves break the joints so that with the elastic packing there is no danger formed and readily applled. What I claim as new is:

1. A red packing comprising a malleable metallic ring adapted to assume a" shape formmg a cylindrical opening for rods of different diameters and having abeveled packing.

2.- As an article of' manufacture a trianguouter surface adapted to receive anelastic esv of leakage pastthe rings. The interlocking prevents these joints from coming into reg-- ister. In this'way a metallic packing ofpractically universal application can be of said bars may be bent into the form of a ring with broken joints, and interlocked to maintain the interlocked position.

13. As an article of manufacture. a triangularly shaped bar of malleable metal having interlocking portions thereon shapedto interlock with a portion of the same bar or a similar bar turned in the opposite direction,

whereby two of said bars may be bent. into the form of a ring and interlocked to maintain the interlocked position.

4. A rod packing made up of two bars'of triangular shape in cross section and having interlocking means thereon, the saidv bars be;

ing

bars may be arranged sideby side,'jthe li s of one extending into the spacesbetween e lips of the other, the two bars. forming 9.

arranged side by side and forming a complete ring of triangular shape 1n crosslot) 'trian; alarshape' in cross section having verlapped lips with intervening spaces 0 v at least the length of the lips whereby the v io elastic packing complete ring of triangular shape in cross section and with broken joints.

6. A rod packing comprising packing rings of malleable metal adapted to assume the shape of rods of different diameters and of triangular shape in cross section; and an arranged between the rings on the beveled surfaces, the elastic packing extending outwardly beyond the outer periphery of the rings.

7. A rod packing comprising packing rings of malleable metal, said rings being axially divided, with broken joints between the parts, each part being of triangular shape incross section and forming a complete ring of triangular shape in cross section, the said arts being interlocked; and an elastic pac ing arranged between the rings on the beveled surfaces, formed on the rings.

In testimony. whereof, I have hereunto set my hand in the presence of two subscribing witnesses.

EDWIN J. ARMSTRONG. 

